Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a08e36422d5314b5b680f64fbe73db0d62b2194d7f3fcde94fd737a500b9cab' 
  AND token = 'sWU53VJMPMfEHJ4Ch5QCNPdkqNf2GepvYDA6ywAvpVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}